Which Hub router to use?

Answered Question
Apr 8th, 2009

Hi,

I am finding it difficult to select a HUB router for DMVPN (Hub-Spoke topology) where there are 42 spokes with ADSL2+ connections and a 100Mb Ethernet at the HUB site. Will a Cisco 2821 router be enough to handle that amount of VPN traffic or will an upgrade be required?

thanks is advance.

Mike

I have this problem too.
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Correct Answer by Joseph W. Doherty about 7 years 9 months ago

200 Mbps (100 Mbps duplex) is likely too much for a 2821. However, if the 42 ADSL2+ connections sum less or you expect links not hit max, you can size for expected load.

Attached is a reference sheets for VPN performance. Take note of Table 5 (don't forget to allow for duplex bandwidth).

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lamav Wed, 04/08/2009 - 17:15

Mike:

You should really review the data sheets for each router.

From my experience, the 7206VXR works great for this type of deployment. That is what we use on our network and it runs like a champ.

We have just about the same number of GRE over IPSec tunnels that you have.

HTH

Victor

Correct Answer
Joseph W. Doherty Wed, 04/08/2009 - 17:31

200 Mbps (100 Mbps duplex) is likely too much for a 2821. However, if the 42 ADSL2+ connections sum less or you expect links not hit max, you can size for expected load.

Attached is a reference sheets for VPN performance. Take note of Table 5 (don't forget to allow for duplex bandwidth).

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